Noun
One skilled in arithmetic.
Source: Webster's dictionaryWittkowsky, Swift's Modest Proposal, p101 In the piece, Swift adopts the "technique of a political arithmetician" Wittkowsky, Swift's Modest Proposal, p95 to show the utter ridiculousness of trying to prove any proposal with dispassionate statistics. Source: Internet
The philosopher, on the other hand, must be an arithmetician "because he has to arise out of the sea of change and lay hold of true being." Source: Internet